Can I wear jeans during the monsoon?

Avoid them entirely. Once denim gets wet, it becomes heavy, chafes your skin, and will likely stay damp for your entire trip.

Is it worth bringing an umbrella?

Don't bother bringing one from home. Buy a sturdy, cheap monsoon-rated umbrella from a local street vendor for about 3-5 dollars; they are built specifically for the local wind conditions.

How to dress for monsoon season in India

Prioritize synthetic, quick-drying fabrics over cotton and opt for open-toed, water-resistant footwear. Layering is key, as you will constantly transition between humid outdoor heat and aggressive, freezing indoor air conditioning.

Choose the right fabrics. Avoid heavy cotton or denim, which take days to dry once soaked. Choose polyester blends, nylon, or moisture-wicking athletic gear that can air-dry in a hotel bathroom overnight.
Select footwear carefully. Leave the suede and canvas shoes at home. Wear Teva-style strapped sandals or lightweight, non-slip rubber loafers that can handle deep puddles and slippery marble floors.
Prepare for the temperature shift. Carry a lightweight, packable synthetic rain shell or a fast-drying pashmina. Malls, offices, and long-distance trains often blast the A/C, making the indoor temperature feel like 18°C while it is 32°C outside.
Pack for modesty and utility. If visiting religious sites, ensure your shoulders and knees remain covered even in the heat. Choose loose-fitting, wide-leg trousers that allow airflow but won't get heavy if they get splashed.

Can I wear jeans during the monsoon?: Avoid them entirely. Once denim gets wet, it becomes heavy, chafes your skin, and will likely stay damp for your entire trip.
Is it worth bringing an umbrella?: Don't bother bringing one from home. Buy a sturdy, cheap monsoon-rated umbrella from a local street vendor for about 3-5 dollars; they are built specifically for the local wind conditions.